The Chicago Journal of Theoretical Computer Science
provides working papers containing rapidly changing
information of timely interest. Authors and editors of working papers
modify them as needed to keep the information as current as
possible. From time to time, the editors will produce archival
versions of working papers, freezing the contents at a particular time
so they may be cited in a stable form. These archival versions will be
produced in the same way as research articles, with formal numbers and
front matter. We anticipate that the dynamic version of a working
paper, which contains the most current information, will be most
useful, but please make formal citations only to the archival versions.